The majority vote was to make the silencer in CSP2 free, a sensible decision!
There are many suppliers but on quality and knowledge of our cars I would recommend Matt Simpson at Simpson Race Exhausts. If you know the o/d of your primary single pipe then you can get the silencer made so that it needs no welding to instal / remove on a slide-over basis and same goes for the tail pipe - specify the silencer exit pipe o/d and have a tail pipe made to slide over using Nikelor clamps.